But if the tracks and the component terminations are solder, you won't get a very reliable connection with silver loaded epoxy .... Peter -- -------------------------------------------------------- Peter Swanson [log in to unmask] INTERTRONICS http://www.intertronics.co.uk INTERTRONICS is dedicated to providing quality material, consumable and equipment solutions to the electronics manufacturing and other technology based industries, with the highest levels of technical support and customer service. -----Original Message----- From: Joe V. Ottesen [mailto:[log in to unmask]] Sent: 11 January 2001 7:09 To: [log in to unmask] Subject: Re: [TN] RF Surface mount... "Stephen R. Gregory" wrote: > Hey all, > > We've got a job in here that's going to be a few RF assembies. It uses > surface mount in the design, but the board doesn't have any soldermask at all > on the surface. > > The last time I dealt with something such as this, and tried to print solder > paste, place components, and reflow, all I wound-up with is a bunch of > tomb-stones, and insufficient solder all over the board because the solder > wants to flow out all along the surface layer traces, and goes where-ever it > wants to go...because there's no soldermask to contain it. > > I'll try to post a picture of what I'm getting ready to deal with on my > free-drive tomorrow... > > This is not high volume at all, but from past experience it's my take that we > should just hand solder stuff like this...because we'll wind-up touching-up > everything anyway...have any of you ever dealt with stuff like this before? > > -Steve Gregory- > > ------------------------------------------------------------------------ --------- > Technet Mail List provided as a free service by IPC using LISTSERV 1.8d > To unsubscribe, send a message to [log in to unmask] with following text in > the BODY (NOT the subject field): SIGNOFF Technet > To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL > Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives > Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional > information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 > ------------------------------------------------------------------------ --------- Hey, Have you considered using conductive glue.....that stays were you dispense it. -- Joe V. Ottosen Website http://www.bbelectronics.dk --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------